Experimental Research on V-A Characteristics of Metal Oxide Varistors under Very Fast Transient Wave

doi:10.7652/xjtuxb201410009

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Experimental Research on V-A Characteristics of Metal Oxide Varistors under Very Fast Transient Wave

更新时间：2025-07-09

- Experimental Research on V-A Characteristics of Metal Oxide Varistors under Very Fast Transient Wave
- Vol. 48, Issue 10, Pages: 54-59(2014)
- 作者机构：
  
  西安交通大学电气工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201410009
  CLC： TM862
- Online First：10 October 2014，
  
  Published：2014
- 稿件说明：
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Experimental Research on V-A Characteristics of Metal Oxide Varistors under Very Fast Transient Wave[J]. 2014, 48(10): 54-59.
DOI：

Experimental Research on V-A Characteristics of Metal Oxide Varistors under Very Fast Transient Wave[J]. 2014, 48(10): 54-59. DOI： 10.7652/xjtuxb201410009.

摘要

设计搭建了模拟特快速瞬态过电压发生器

并确定了相关的电压、电流测量方法

选定具有代表性的超高压避雷器使用的金属氧化物电阻片(MOV)作为研究对象

试验研究了MOV在电流波头时间为80～150 ns的特快波前冲击电流下的伏安特性、电流陡度的影响关系及阻抗特性。在特快波前冲击电流作用下

MOV伏安特性试验结果表明:随着电流波头时间的减小

MOV的电压峰值升高

MOV电压峰值远大于同电流标准雷电波下的电压峰值

特快波前电流冲击波下MOV残压上升约9%～16%; MOV的电压峰值随着电流峰值的增大而增大

而且电流波头时间越短

同一电流值下的电压峰值越高

在特快波前冲击电流波头时间由150 ns变化至80 ns时

MOV电压峰值上升约为10%～20%; 在试验研究的电流波头时间范围和电流峰值范围内

电压峰值出现的时间明显超前于电流峰值出现的时间

呈现感性阻抗特征。

Abstract

Very fast transient overvoltage(VFTO)waveform generator is designed and constructed based on the second-order circuit theory

and the voltage and current measurement scheme is determined. Two different specifications of representative metal oxide varistors(MOV)are chosen as the samples

and the V-A characteristic and impedance behavior of MOV under impulse current within the range of 80-150 ns are investigated. The experiments indicate that as the current peak remains constant

the residual voltage under VFTO reaches approximately 9%-16% higher than the standard lightning impulse voltage; with the rising applied current from 80 ns to 150 ns

the voltage peak value increases by 10% to 20%; the voltage peak comes obviously earlier than the current peak

exhibiting the inductive behavior.

关键词

Keywords

references

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